<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="js/test02.js" type="text/javascript"></script>
</head>
<body>
    <input type="button" name="btn" onclick="f2()" value="计算两数运算结果"/>
</body>
</html>